The statement "I have always known it was you" conveys a deep sense of recognition and certainty in a romantic context. It suggests that the speaker has always been certain about their feelings and their connection with the person they are addressing.
The use of "always" implies that this knowledge or recognition has been consistent over time, perhaps even from the very beginning of their relationship or acquaintance. It implies that there was a sense of inevitability about their connection.
In essence, this quote beautifully encapsulates the idea of destiny or a strong sense of connection with a particular person. It conveys the belief that out of all the people they could have met or been with, this person was always the one they were meant to be with. It's a declaration of a profound and enduring connection.